FKIE_CVE-2026-23326

Vulnerability from fkie_nvd - Published: 2026-03-25 11:16 - Updated: 2026-03-25 15:41
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: xsk: Fix fragment node deletion to prevent buffer leak After commit b692bf9a7543 ("xsk: Get rid of xdp_buff_xsk::xskb_list_node"), the list_node field is reused for both the xskb pool list and the buffer free list, this causes a buffer leak as described below. xp_free() checks if a buffer is already on the free list using list_empty(&xskb->list_node). When list_del() is used to remove a node from the xskb pool list, it doesn't reinitialize the node pointers. This means list_empty() will return false even after the node has been removed, causing xp_free() to incorrectly skip adding the buffer to the free list. Fix this by using list_del_init() instead of list_del() in all fragment handling paths, this ensures the list node is reinitialized after removal, allowing the list_empty() to work correctly.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2a9ea988465ece5b6896b1bdc144170a64e84c35
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60abb0ac11dccd6b98fd9182bc5f85b621688861
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/645c6d8376ad4913cbffe0e0c2cca0c4febbe596
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b38cbd4af5034635cff109e08788c63f956f3a69
Impacted products
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Fix fragment node deletion to prevent buffer leak\n\nAfter commit b692bf9a7543 (\"xsk: Get rid of xdp_buff_xsk::xskb_list_node\"),\nthe list_node field is reused for both the xskb pool list and the buffer\nfree list, this causes a buffer leak as described below.\n\nxp_free() checks if a buffer is already on the free list using\nlist_empty(\u0026xskb-\u003elist_node). When list_del() is used to remove a node\nfrom the xskb pool list, it doesn\u0027t reinitialize the node pointers.\nThis means list_empty() will return false even after the node has been\nremoved, causing xp_free() to incorrectly skip adding the buffer to the\nfree list.\n\nFix this by using list_del_init() instead of list_del() in all fragment\nhandling paths, this ensures the list node is reinitialized after removal,\nallowing the list_empty() to work correctly."
    }
  ],
  "id": "CVE-2026-23326",
  "lastModified": "2026-03-25T15:41:33.977",
  "metrics": {},
  "published": "2026-03-25T11:16:29.687",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2a9ea988465ece5b6896b1bdc144170a64e84c35"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/60abb0ac11dccd6b98fd9182bc5f85b621688861"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/645c6d8376ad4913cbffe0e0c2cca0c4febbe596"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b38cbd4af5034635cff109e08788c63f956f3a69"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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